Philips Q548.1E Service Manual page 23

No
Switch off LVDS output in 8543
Wait x ms
Switch off the display power by
switching LCD-PWR-ON high
Service Modes, Error Codes, and Fault Finding
Active
Mute all sound outputs via softmute
Wait 100ms
Set main amplifier mute (I/O: audio-mute)
Force ext audio outputs to ground
(I/O: audio reset) a nd wait 5ms
Switch off Ambilight
Wait until Ambilight has faded out: Output power
Observer on PNX5100 should be zero
Switch off POK line detection
algorithm
Switch off LCD backlight
Mute all video outputs
Wait x ms (display file)
PNX5100 present?
Yes
Switch off the display by sending:
- TurnOnDisplay(0) (I²C) command to the PNX5100
- or sending OUTPUT-ENABLE(0) to the LED DIM
panel in case of a LED BL set.
Semi Standby
Figure 5-7 "Active" to "Semi Stand-by" flowchart
Q548.1E LA 5.
The higher level requirement is that the
backlight may not be switched off before the
ambilight functionality is turned off in case the
set contains a CE IPB inverter supply.
The exact timings to
switch off the
display (LVDS
delay, lamp delay)
are defined in the
display file.
18440_219_090227.eps
EN 23
270209
2009-Apr-03